A sum becomes 3 times of itself in 10 years at simple interest. In how many years will it become 7 times of itself at th...

Type: MCQ • Marks: 1

A sum becomes 3 times of itself in 10 years at simple interest. In how many years will it become 7 times of itself at the same rate?

A. 1) 30 years

B. 2) 35 years

C. 3) 25 years

D. 4) 20 years

Explanation

3 times means Interest = 2P in 10 years => Interest per year = 0.2P. 7 times means Interest required = 6P. Time required = 6P / 0.2P = 30 years.

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UP TGT Mathematics

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